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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * accompanied this code).
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package jdk.graal.compiler.hotspot.test;

import jdk.graal.compiler.replacements.test.MethodSubstitutionTest;
import jdk.graal.compiler.test.AddExports;
import org.junit.Assume;
import org.junit.Test;

import jdk.internal.misc.Unsafe;
import jdk.vm.ci.meta.ResolvedJavaMethod;

/**
 * Tests intrinsics for CPU cache management methods added to Unsafe by JEP 352.
 */
@AddExports("java.base/jdk.internal.misc")
public class UnsafeWritebackMemoryTest extends MethodSubstitutionTest {

    @Test
    public void test() {
        Assume.assumeTrue(Unsafe.isWritebackEnabled());
        Unsafe unsafe = Unsafe.getUnsafe();
        ResolvedJavaMethod method = getResolvedJavaMethod(Unsafe.class, "writebackMemory");
        final long size = 8 * 1024;
        final long address = unsafe.allocateMemory(size);
        try {
            test(method, unsafe, address, size);
        } finally {
            unsafe.freeMemory(address);
        }
    }
}
